KR19990054671A - dish washer - Google Patents

Abstract

The present invention relates to a dishwasher having a washing tank and a spray nozzle rotatably installed in the washing tank, the water supply port being connected to a pump fan accommodating part and a water supply pipe connected to the spray nozzle, a drain hole connected to the drain pipe, and the pump. A pump housing having a water supply flow passage and a drain flow passage, which respectively extend from the fan accommodation portion to the water supply port and the drain port, a pump fan rotatably installed in the pump fan accommodation portion, and the pump fan is rotated forward and backward. A drive motor for enabling the valve body to move selectively between the water supply port and the drain port through an intersection of the water supply flow path and the drain flow path by water flow according to the rotation of the pump fan. It is characterized by including. Thereby, since water supply and drainage can be performed by a single pump, the compact structure and the manufacturing cost can be reduced.

Description

dish washer

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher, and more particularly, to a dishwasher that enables compactness of the structure and reduction of manufacturing cost since water supply and drainage can be performed by a single pump.

1 is a perspective view of a conventional dishwasher, Figure 2 is a longitudinal cross-sectional view of a conventional dishwasher. As shown in these figures, the conventional dishwasher 1 is provided with a load driving portion for operating the dishwasher 1 in the washing tank 2 and the lower portion of the washing tank 2 in the main body casing 3 forming the appearance. have. In the load driving unit, a water supply pump 11 and a drain pump 21 are coupled to both sides with a sump case 5 provided in a central region, and an external water supply pipe to which the wash water from the outside is supplied to the sump case 5. (18) is combined. The external water supply pipe 18 is provided with a water supply valve 19 for opening and closing the flow path of the washing water on the flow path, which is controlled by a controller (not shown).

On the other hand, the water supply pump 11 is connected to the water supply pipe (15, 16) in communication with the inside of the washing tank (2), the drainage pump 21 is coupled to the drain pipe 25 in communication with the outside. Each pump 11, 21 is provided with a water supply fan 13 and a drain pan 23 for drawing and feeding the washing water stored in the sump case 5.

The water feed pump 11 and the drain pump 21 generally have the same configuration but differ only in size, and FIG. 3 shows a water supply pump 11 of these pumps as an enlarged cross-sectional view. Inside the housing of the water feed pump 11 is divided into a motor accommodating portion 14 for a driving motor (not shown) and a water supply fan accommodating portion 12 for a water supply fan 13, each driven only in one direction. The drive motor and the water supply fan 13 coupled to the rotating shaft of the drive motor is accommodated. A water supply port is formed on an outer surface of the water supply fan accommodating part 12, and the water supply pipes 15 and 16 communicating with the washing tank 2 are coupled to the water supply port. At the ends of the water supply pipes 15 and 16, a spray nozzle 17 for spraying the washing water into the washing tank 2 is coupled.

On the other hand, the inside of the housing of the drain pump 21 is also divided into a motor accommodating portion 24 and a drain fan accommodating portion 22, each of which is coupled to a drive motor for driving only in one direction and a rotation shaft of the drive motor. The drain pan 23 is accommodated. A drain port is formed on the outer surface of the housing of the drain pan accommodating portion 22, and a drain pipe 25 communicating with the outside is coupled to the drain port. A drain valve (not shown) is provided on the flow path of the drain pipe 25.

By this configuration, when the water supply valve 19 is opened, the washing water flows in through the external water supply pipe 18 and is received in the sump case 5. When the water supply valve 19 is closed by the control of a control unit (not shown), the operation of the water supply pump 11 is started, and at this time, the washing water in the sump case 5 passes through the water supply fan accommodation portion 12 to supply the water supply pipe 15, 16). The washing water is sprayed into the washing tank 2 through the spray nozzle 17 coupled to the ends of the water supply pipes 15 and 16, and the washing water sprayed into the washing tank 2 and finished dishwashing flows down the washing tank 2 It flows back into the sump case (5). Then, the process of spraying the washing tank 2 through the water supply pipes 15 and 16 again is repeated for a predetermined time.

When the predetermined time elapses, the drain valve (not shown) is also opened by the control of the controller, and the operation of the drain pump 21 is started. Then, the washing water which has completed the washing in the sump case 5 by the operation of the drain pan 23 on the drain pump 21 is discharged to the outside through the drain pipe 35.

However, in the dishwasher 1 having such a conventional washing water pump, a water supply pump 11 for supplying the washing water into the washing tank 2 and a drain pump 21 for discharging the washing water after washing the dish are separately provided. The configuration of the device itself is complicated, and therefore, the volume of the main body casing 3 is inevitably large. And, since these pumps (11, 21) are relatively expensive components, not only is the main cause of increasing the production cost of the equipment, but also the drainage time is long due to the miniaturization of the drain pump 21 according to the recent trend There is a problem.

Accordingly, an object of the present invention is to provide a washing water pump of a dishwasher having a simple configuration capable of integrally carrying out the water supply into the washing tank and the drainage from the washing tank in view of these problems in the related art, thereby promoting efficient water supply and drainage. At the same time to provide a dishwasher to lower the manufacturing cost of the dishwasher.

1 is a perspective view of a conventional dishwasher,

Figure 2 is a longitudinal cross-sectional view of a conventional dishwasher,

3 is a cross-sectional view of the washing water pump of the conventional dishwasher,

Figure 4 is a cross-sectional view of the wash water pump of the dishwasher according to the present invention,

5 and 6 are views showing the operating state of the valve body installed in the wash water pump according to the present invention.

<Description of the symbols for the main parts of the drawings>

2: washing tank 5: sump case

10: washing water inlet pipe 11: feed water pump

15,16: water supply pipe 17: injection nozzle

21: drain pump 25: drain pipe

30: washing water pump 31: pump housing

32: pump fan housing 33: pump fan

36: water supply port 37: drain

38: water supply flow path 39: drainage flow path

41: valve body

According to the present invention, in the dishwasher having a washing tank and a spray nozzle rotatably installed in the washing tank, the water supply port is connected to the water supply pipe connected to the pump fan accommodating portion and the injection nozzle and the drain hole is connected And a pump housing having a water supply flow passage and a drain flow passage, which respectively extend from the pump fan accommodation portion to the water supply port and the drain port, and which are rotatably installed in the pump fan accommodation portion, and the pump fan. A drive motor for enabling reverse rotation and the water flow according to the rotation of the pump fan through the intersection of the water supply flow path and the drain flow path is installed between the water supply port and the drain port and selectively installed to be blocked A dishwasher characterized by including a valve body.

Here, the crossing position is preferably located below the water supply port and the drain port, the valve body may be a spherical body. The water supply flow passage and the drain flow passage are preferably formed in a tangential direction at adjacent portions of the pump fan.

Hereinafter, the present invention will be described in detail with reference to the drawings.

Figure 4 is a cross-sectional view of the wash water pump of the dishwasher according to the present invention. The dishwasher according to the present invention has the washing water pump 30 shown in the drawings, except for the washing water pump 30, which is the same as the conventional dish washing machine. As shown, the present wash water pump 30 is composed of a pump housing 31 forming an external appearance, and a forward and backward drive motor and a pump fan 33 accommodated in the pump housing 31. The inside of the pump housing 31 is divided into a pump fan accommodating part 32 accommodating the pump fan 33 and a motor accommodating part accommodating the driving motor. The pump fan accommodating part 32 includes a forward and a reverse motor. The pump fan 33 which rotates by the driving force of is accommodated. It is preferable that the pump fan 33 uses a forward / reverse drive pump fan 33 that can easily rotate in the corresponding direction according to the forward / reverse rotation of the forward / reverse drive motor.

A washing water inlet is formed at the side facing the sump case 5 of the pump fan accommodating portion 32 of the pump housing 31, and the sump case 5 and the pump fan accommodating portion 32 are mutually formed at the washing water inlet. The washing water inlet pipe 10 is connected in communication with each other. When the pump fan 33 is rotated, the washing water stored in the sump case 5 is drawn out to the washing water inlet pipe 10 and introduced into the pump chamber.

On the other hand, a pair of washing water flow paths 34 and 35 are formed on the side wall of the pump fan accommodating part 32, and the washing water flow paths 34 and 35 are formed in a tangential direction in an adjacent portion of the pump fan 33. And intersects in the middle and is connected to the water supply port (36) connected to the water supply pipe (15, 16), and the drain hole (37) connected to the drain pipe (25). Hereinafter, the washing water flow passage 36 and the water supply passage 36 are referred to as the water supply flow passage 38 and the washing water flow passage leading to the drainage 37 is referred to as the drainage flow passage 39. The intersecting position of the water supply flow passage 38 and the drainage flow passage 39 is located at the lower portion of the water supply port 36 and the drain opening 37, and is capable of flowing between the crossing position and the water supply opening 36 and the drain opening 37. A spherical valve body 41 is provided. The valve body 41 is made of a material which is movable by water flow and sinks in water. The valve body 41 intersects the water supply flow path 34 and the drainage flow path 35 by the rotation flow due to the forward and reverse rotation of the pump fan 33. It flows between the water supply port 36 and the drain 37 through the position and closes one side.

5 and 6 show the operating state of the valve body 41 installed in the wash water pump 30 according to the present invention. When the dishwasher 1 equipped with the washing water pump 30 is supplied with power and starts to be operated by an external operation, the water supply valve 19 is opened to allow water to be supplied from the outside through the external water supply pipe 18. do. The supplied water is stored in the sump case 5, and when the washing water pump 30 is rotated in one direction, for example, clockwise as shown in FIG. Accordingly, the wash water stored in the sump case 5 is drawn out through the washing water inlet pipe 10 to be introduced into the pump fan accommodating part 32. When the amount of the washing water is gradually increased, accordingly, the rotational force is also increased, and moves to the drain hole 37 by the rotational water pressure of the washing water to block the drain hole 37. Then, the washing water is discharged only to the open water inlet 36, and the washing water discharged is sprayed into the washing tank 2 through the spray nozzle 17 provided in the washing tank 2 to wash the dishes.

On the other hand, after the washing water pump 30 is driven in one direction to wash the dishes by washing water injection for a predetermined time, the control unit stops driving of the washing water pump 30. Then, the washing water washing the dishes in the washing tank (2) is introduced into the sump case (5), at this time, the control unit drives the washing water pump (30) in the reverse direction. Then, the pump fan 33 of the washing water pump 30 is rotated counterclockwise as shown in FIG. 6, and the washing water is pump pump as seen in the clockwise rotation of the pump fan 33. It is drawn out to the receiving part 32 and rotates, and by this rotational flow, the valve body 41 moves toward the water supply port 36 to block the water supply port 36. Then, the washing water in the washing tank 2 is discharged to the outside through the drain hole 37.

Then, when the drainage is completed, the water supply proceeds in the washing tank 2 again by the program input to the control unit, and the dish washing operation of the device is continuously performed.

In the above-described and illustrated embodiments, the intersection of the water supply flow path and the drain flow path is located at the lower part of the water supply port and the drain port, but the valve body flows by the water flow and the cross position and the water supply port of the water supply port and the drain port so that one side blocks the washing water discharge port. If the position is set, it does not matter where the intersection is. In addition, the valve body may be configured to have a shape that can block the discharge port even if it is not a spherical body, the water supply flow path and the drain flow path is a flow path of the washing water to rotate in any direction even if not formed in a tangential direction in the adjacent portion of the pump fan It is sufficient if it is guided and formed at such a point that the two flow paths intersect and have a structure that enables selective shutoff of the valve body.

As described above, according to the present invention, since water supply and drainage can be performed by a single pump, it is possible to compact the structure and reduce manufacturing costs.

Claims (4)

In the dishwasher having a washing tank and a spray nozzle rotatably installed in the washing tank, A water supply passage and a water drainage line connected to the water supply port connected to the water supply pipe connected to the pump fan receiving portion, the water injection nozzle, the water supply port connected to the drainage pipe, and connected to the water supply port and the water discharge port from the pump fan accommodation portion, respectively. A pump housing having a flow path, A pump fan rotatably installed in the pump fan accommodation portion; A drive motor for allowing the pump fan to be rotated forward and backward; Tableware, characterized in that the valve body is installed to be selectively shut off and move between the water supply port and the drain port through the intersection of the water supply flow path and the drain flow path by the water flow according to the rotation of the pump fan syringe. The method of claim 1, The crossing position is a dishwasher, characterized in that located in the lower portion of the water supply port and the drain. The method according to claim 1 or 2, And the valve body is a spherical body. The method of claim 1, And the water supply flow passage and the drain flow passage are formed in a tangential direction in an adjacent portion of the pump fan.